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Cheap flights from Idaho to London from £242

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated 6 November 2025.

Round-trip from

£433

One-way from

£242

Popular in

June

Cheapest in

October

Average price

£728
Virgin Atlantic
  • Virgin Atlantic
  • 17/2-26/2
  • 2 total stops
  • 32h 13m total
  • Idaho to London
Search Deals
6/12
  • 6/12
  • 2 total stops
  • 26h 34m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£164 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Idaho to London

Enter your travel dates to find the best prices.

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.

Wed 5/1113:00BOI - LHR
1 stop14h 00mDelta
Wed 12/1106:20LHR - BOI
2 stops21h 04mDelta
Deal found 4/11£452
Wed 5/1114:38GEG - LHR
1 stop18h 12mDelta
Wed 19/1106:20LHR - GEG
2 stops20h 38mDelta
Deal found 5/11£452
Wed 3/1207:00JAC - LHR
1 stop20h 00mKLM
Mon 8/1220:25LHR - JAC
2 stops27h 40mKLM
Deal found 5/11£453
Tue 2/1211:44BOI - LHR
1 stop15h 46mDelta
Tue 9/1206:20LHR - BOI
2 stops19h 31mDelta
Deal found 4/11£453
Wed 12/1106:05GEG - LHR
1 stop17h 00mKLM
Wed 3/1206:30LHR - GEG
2 stops16h 25mKLM
Deal found 4/11£453
Wed 12/1106:00GEG - LHR
2 stops18h 45mDelta
Wed 3/1206:30LHR - GEG
2 stops20h 26mDelta
Deal found 6/11£456
Wed 5/1105:42BOI - LHR
1 stop18h 23mMultiple Airlines
Wed 12/1111:20LHR - BOI
1 stop18h 19mMultiple Airlines
Deal found 4/11£458
Wed 5/1109:45GEG - LHR
1 stop16h 15mKLM
Wed 19/1111:05LHR - GEG
1 stop16h 58mKLM
Deal found 4/11£458
Fri 5/1209:00BOI - LHR
1 stop18h 30mDelta
Wed 24/1206:20LHR - BOI
2 stops19h 47mDelta
Deal found 5/11£471
Thu 4/1216:25JAC - LHR
2 stops31h 45mUnited Airlines
Thu 11/1206:35LHR - JAC
2 stops21h 02mUnited Airlines
Deal found 4/11£473
Fri 5/1214:04BOI - LHR
1 stop14h 36mAir France
Wed 24/1211:20LHR - BOI
1 stop17h 05mAir France
Deal found 5/11£476
Thu 27/1106:05GEG - LHR
1 stop17h 00mMultiple Airlines
Thu 4/1206:20LHR - GEG
2 stops16h 35mMultiple Airlines
Deal found 5/11£490

Cheapflights Fare Finder

 
Customise your flight search to find flights from Idaho to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 6 November 2025.
Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Idaho

Fly to

London

Route

Depart

Return

Price

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 3/12

07:00-10:00

1 stop20h 00m

London Heathrow

Mon 8/12

20:25-17:05

2 stops27h 40m

£453

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

10:36-10:30

1 stop16h 54m

London Heathrow

Tue 24/2

09:00-22:49

2 stops20h 49m

£458

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

07:30-12:50

1 stop22h 20m

London Heathrow

Fri 27/2

06:20-18:28

2 stops19h 08m

£458

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 17/2

07:10-10:30

1 stop19h 20m

London Heathrow

Wed 4/3

09:00-21:20

2 stops20h 20m

£458

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 24/2

13:20-10:30

1 stop13h 10m

London Heathrow

Tue 10/3

06:20-21:03

2 stops21h 43m

£458

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/2

06:30-07:05

1 stop16h 35m

London Heathrow

Mon 9/2

06:30-21:20

2 stops22h 50m

£462

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 24/2

12:47-11:40

1 stop14h 53m

London Heathrow

Tue 10/3

12:10-22:02

1 stop16h 52m

£463

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Thu 4/12

07:00-09:40

1 stop19h 40m

London Heathrow

Thu 11/12

06:35-20:37

2 stops21h 02m

£473

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 12/2

10:45-09:40

1 stop15h 55m

London Heathrow

Thu 26/2

06:35-09:48

2 stops34h 13m

£479

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 12/2

05:25-06:20

2 stops17h 55m

London Heathrow

Thu 26/2

06:20-17:48

2 stops18h 28m

£481

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London

What is the cheapest month to book a flight from Idaho to London?

Currently, July is the cheapest month in which you can book a flight from Idaho to London (average of £469). Flying from Idaho to London in June is currently the most expensive (average of £832). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to LON?

Find hourly flight availability from Idaho to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 November 2025.

A simple way to save on the total cost of your ticket is to fly from Idaho to London in the evening. If you’re flexible enough to do this you can expect to save up to 55% on your trip compared to booking a flight at midday.

Related info for your journey

Find useful and relevant information for your journey from Idaho to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Idaho to London?

    A quick flight from Idaho to London can take about 16h 35m. KLM provides one of the quickest options available for as low as £462. The distance from Idaho to London is about 4643 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Idaho to London one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as £306. However, be on the lookout for offers from Lufthansa and Air New Zealand, as they are both options that can get you from Idaho to London for a low price.

  • What are the most popular routes from Idaho to London?

    While some choose either Boise Air Term. Gowen Fld - London Heathrow or Spokane - London Gatwick, Spokane - London Heathrow is the most popular route from Idaho to London.

  • Can I find deals for flights from Idaho to London that include hotel bookings?

    Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Idaho to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.

  • Can I find deals for business class flights from Idaho to London?

    Yes. Cheapflights offers flight deals from Idaho to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to London?

    Currently, July is the cheapest month in which you can book a flight from Idaho to London (average of £469). Flying from Idaho to London in June is currently the most expensive (average of £832). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Croydon
Slough
Gatwick
Hounslow
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
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Ipswich
Bedford
Eastbourne

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How does Cheapflights help users find flights from Idaho to London?

When you search for this flight from Idaho to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Idaho to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Idaho to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Idaho to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho to London flexibly with Cheapflights today.

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Of course! You can now track prices for flights from Idaho to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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